Fix incorrect names used / generated on ARM

Author: TimNN

src/arm.rs

@@ -8,7 +8,7 @@ pub unsafe fn __aeabi_uidivmod() {
     asm!("push {lr}
           sub sp, sp, #4
           mov r2, sp
-          bl __udivmodsi4
+          bl ___udivmodsi4
           ldr r1, [sp]
           add sp, sp, #4
           pop {pc}" ::: "memory" : "volatile");
@@ -22,7 +22,7 @@ pub unsafe fn __aeabi_uldivmod() {
           sub sp, sp, #16
           add r4, sp, #8
           str r4, [sp]
-          bl __udivmoddi4
+          bl ___udivmoddi4
           ldr r2, [sp, #8]
           ldr r3, [sp, #12]
           add sp, sp, #16
@@ -34,7 +34,7 @@ pub unsafe fn __aeabi_uldivmod() {
 #[cfg_attr(not(feature = "mangled-names"), no_mangle)]
 pub unsafe fn __aeabi_idivmod() {
     asm!("push {r0, r1, r4, lr}
-          bl __aeabi_idiv
+          bl ___aeabi_idiv
           pop {r1, r2}
           muls r2, r2, r0
           subs r1, r1, r2
@@ -49,7 +49,7 @@ pub unsafe fn __aeabi_ldivmod() {
           sub sp, sp, #16
           add r4, sp, #8
           str r4, [sp]
-          bl __divmoddi4
+          bl ___divmoddi4
           ldr r2, [sp, #8]
           ldr r3, [sp, #12]
           add sp, sp, #16

src/macros.rs

@@ -210,6 +210,7 @@ macro_rules! intrinsics {
         $($rest:tt)*
     ) => (
         #[cfg(target_arch = "arm")]
+        #[cfg_attr(not(feature = "mangled-names"), no_mangle)]
         pub extern $abi fn $name( $($argname: $ty),* ) -> $ret {
             $($body)*
         }